Mold for making castings.



No. 807,024. PATENTED DEC. 12, 1905. I

G. D. GRIMES, B. I. EILERMAN & T. A. LEGLER, JR. MOLD FOR MAKINGGASTINGS.

APPLICATION FILED FEB.8.1905.

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, wamm I I ms? 4. m 34% No. 807,024. PATENTED DEC. 12, 1905.

c. 1). GRIMES, B. F. EILERMAN & T. A. LEGLER, JR"

MOLD FOR MAKING GASTINGS.

APPLICATION FILED FBB.8. 1905.

3 SHEETS-SHEET 3.

Q I Smvewtom STATES PATENT OFFICE.

CHARLES D. GRIMES, BENJAMIN F. EILERMAN, AND THOMAS A.

' LEGLER, JR, OF DAYTON, OHIO.

MOLD FOR MAKING CASTINGS- Specification of Letters Patent.

Patented Dec. 12, 1905.

Application filed I'ehruary 8, 1905- Serial No. 244,739.

To all whom it may concern:

Be it known that we, CHARLES D. GRIMEs, BENJAMIN F. EILERMAN, and THOMASA. Lue- LER, Jr., citizens of the United States, residing at Dayton, inthe county of Montgomery and State of Ohio, have invented certain newand useful Improvements in Molds for Making Castings, of which thefollowing is a specification.

Our invention relates toimprovements in founding devices, andparticularly to metallic dies or molds for use in making smooth castingsfrom molten metal.

The object of our invention is to simplify the construction, as wellasthe means and mode of operation of such devices, whereby they will notonly be cheapened in construction, but will be rapid, accurate, andefiicient in operation and unlikely to get out of repair, and, further,provide a device whereby castings from molten metal may be cheaply andrapidly made by a person unskilled in the molding art.

A further object is to provide a device for making undercut castingswherein the operation of opening the mold will automatically withdrawthe'various false cores or drawbacks which may be necessary to give theproper form.

With the above primary and other incidental objects in view ourinvention consists of the parts, constructions, and mode of operation,or their equivalents, hereinafter described, and set forth in theclaims.

In the drawings, Figure 1 is a plan view, partly in section, of thedevice as adapted to making and ejecting from the mold simple castingsof such shape as will permit them to be readily delivered. Fig. 2 is aside view of the device as shown in Fig. 1. Fig. 3 is an end view of thesame. Fig. 4 is a plan view of the device, partly in section, as adaptedfor making undercut castings or castings with figures or characters inrelief thereon, as typewheels, &c. Figs. 5 and 6 are detail views ofparts of the mechanism of the device illustrated in Fig. 4.. Fig. 7 is amodification of the device illustrated in Fig. 4.

Like parts are represented by similar characters of reference throughoutthe several views. 4

Our present invention is especially adapted to be used in conjunctionwith the castingmachine illustrated in our pending application, SerialNo. 220,645.

. In constructing the device there is employed is provided with theingate b Slidabl'y mo unted in suitable hearings in the transverse barsa a is a plunger 0, which is operated by eccentrics 0', having anoperating-lever 0 The eccentrics c are preferably arranged in duplicate,one on either side of the plunger 0, as shown in Fig. 2, and theoperating-lever c is correspondingly bifurcated, as indicated in Fig. 3.The eccentrics c are pivotally secured to the plunger 0 at the points 0and bear against the inner side of the bars a a. Secured to the innerend of the plunger 0 is a head 0*, having openings 0 therein, throughwhich extend the studs a" a Pivotally attached to the head 0 on oppositesides thereof are links 6 rigidly secured at their opposite extremitiesto the cope b. The transverse bar a is recessed or notched, as at (0 inorder to accommodate the said links 6 By this construction it will beseen that upon operating the lever 0 the plunger c, with its attachedhead 0*, will be moved inward, causing the mold to open along theparting line .70 m by moving the cope b away from the drag b by means ofthe connectinglinks 6 between the cope b and the head 0*, and so permitthe removal of the finished casting, (indicated at a.)

To facilitate the delivery of the finished casting, we provide ejectormeans for same, as follows: The plunger 0 is formed with a longitudinalbore, as indicated by dotted lines, Fig. 1. Into this bore extends thestem d of a head (Z, which is provided with one or more ejector-pins (ZThe number of ejector-pins employed depends upon the size and shape ofthe casting. These ejector-pins are secured to the head d, preferably bybeing screwthreaded into same, and provided with locknuts d asillustrated, and extend through suitable openings in the transverse bara and the cope b and are of such length that when in their normalposition their ends will coincide with the inner walls of the mold andform therewith a continuous surface.

By means of the screw-threaded connection of the ejector-pins with theejector-head (Z, as before mentioned, adjustment of the ejectorpins ispermitted to bring the ends of the said pins into proper relation withthe inner surface of the mold when in their normal position.

Extending upward from the ejector-head (Z through the head and havingtheir head when in normal position countersunk in said head 0 are two ormore bolts d". Like the ejector-pins, these are provided with lock-nutsd to provide for proper adjustment and have screw-threaded connections.

The operation of the lever 0 will cause the head 0 to move inward andopen the die or mold in the manner hereinbefore described preparatory tothe discharge of the casting. Upon the further movement of the lever 0the head 0* will contact the ejector-head d or the lock-nuts on thebolts (Z if provided as illustrated, and will carry said ejector-headwith it, causing the ejector-pins d2 to press upon the finished casting2 and push it from the mold, the ejector-pins (11 being moved until theyprotrude into said mold. Upon the return movement of the lever c thehead 0* will move independent of the ejector-head cl until the heads ofthe bolts 6Z4 are engaged by the head 0*, when the ejector-head,together with the pins, will be drawn back to normal position.

Lateral projecting stops a are provided on the studs a a to limit themovement of the ejector-head (Z when the ends of the ejectorpins areflush with the inner surface of the mold.

As a further precaution the adjustable stop a is provided to limit themovement of the operating-lever 0 The stud d of the ejectorhead d,extending within the bore of the plunger 0, serves as'a guide to keepthe various parts in proper alinement.

The hinged connection of the cope I) with the head 0 permits the cope tobe swung aside to permit the inspection of the mold or the substitutionof a different mold.

The extended ends of the transverse bars a a provide means by which thedevicemay be clamped in position for use, and there is further shown insaid bars (see Fig. 3) notches or recesses a to adapt the device to useon parallel rods, as are shown in the aforementioned pendingapplication.

As so far described the device is adapted for making castings of suchshape and possessing such draw as will enable same to be readilydelivered from the mold. However, it is frequently desired to makeundercut castings having either depressions or projections, or both, intheir surface. To accom plish this, one or more drawbacks or falsecores, which form a part of the mold-walls, are employed. These falsecores have formed on that surface which forms a part of the mold theirregular configuration in relief, or intaglio, the reverse oftheconfiguration desired on the casting. These false cores must bewithdrawn from the finished casting before the same can be ejected fromthe mold. Means for making such undercut castings and automaticallywithdrawing the false cores in combination with the structure abovedescribed is illustrated on Sheet No. 2.

Referring to Fig. 4, the device illustrated therein consists of the samestructure, comprising the transverse bars a a a and studs (4 a theplunger 0, the head 0 the operating-lever 0 the ejector-head (Z, andcooperating parts, as were above described and illustrated on Sheet 1,except that the links 6 have been extended to accommodate a mold ofdifferent form. The casting 2' in Fig. 4 is a type-wheel having inrelief on its periphery a series of ten figures. The mold for formingthis type-wheel consists of the drag e, secured to the transverse bar aand having its face formed with a series of radial slots in which arelocated a series of longitudinally-movable false cores 0' e, each ofwhich has formed intaglio in its inner end'one of the characters to beformed in relief on the periphery 'of the casting. The false cores 6'are held in position by a plate 6 secured by screws engaging in thescrew-holes e in the face of the drag e. In a mold of this type thecopef is preferably formed with a projecting portion j, which when themold is closed extends within a ring a, secured to the plate 6 andextending somewhat above said plate to form a portion of the bearing forthe false core 0. The drag 6 has formed on its periphery ahead 6 Theouter ends of the false cores extend beyond the drag a and are beveledon their upper portion and have formed on their lower side a projectionor shoulder e. A series of screws 6 radially arranged in the plate 6 areadapted to be contacted by the shoulder 6 and so limit the inwardmovement of the false cores 6. Pivotally secured to each of the falsecores 0' is an offset lever member 6 the shoulder of which bears uponthe bead e and forms a fulcrum for the member 6 Slidably mounted on thedrag e isa sleeve g, having the flange g, provided with the internalbead g As the sleeve g is moved upward by means hereinafter describedthe bead will contact the upper portion of the lever member 0 and bypressing this portion inward will cause the false cores to be withdrawn.Upon the reverse movement of the sleeve 9 screws g in the flange gwill'contact the bevel portion of the false core and return said coresto their normal position. \It will be seen byreference to Fig. 6 thatthe relation of the screws 9 TOO IIO

and the bead g is such that at the time the bead g contacts the levermember a the screws g will be sufficiently removed from end of the falsecore to permit anoutward movement of the same. lock-nuts g thereonadjustable means is provided for moving the false cores inward untilthelig inner ends are flush with the walls of the mo It is to beunderstood that while the device is shown to be adapted to castingtype-wheels.

it is not limited to the making of castings circular or symmetrical inform, but may be employed to form castings ofvarious irregular shapes.

The means for moving the sleeve 9 for the purpose before mentionedconsists of plates n, preferably arranged in duplicate, one on each sideof the device, pivotally secured to the sleeve 9 at the point n. It isto be understood that only one plate 12 might be used. However, asstated, the duplicate plates are preferred to give more even pressureand prevent the skewing of the parts. In the upper portion of the platen are two cam-slots n n of peculiar shape. A fixed screw or pin n in thetransverse bar a extends through the slot at from the cam c, engages theslot M. The curvature of the cam-slots a n is such that during theinitial movement of the operatinglever c the plate a will be movedlaterally about its pivotal connection at, a portion of the slot 12being on the arc of the circle of which n is the center. A furthermovement of the lever will, through the engagement of the screw n withthe slot 91?, move the plate a to its extreme lateral position, duringwhich movement the cooperation of the cam-slot n and stationary screw nwill cause the plate n and sleeve g to move upward, whereby theWithdrawal of the false cores 0 is accomplished, as before described.When the plate a has reached its extreme position, the slot 021 willcoincide with the path of travel of the screw a and the operating-lever0 will be capable of further movement independent of the plate a andsleeve 9, whereby the finished casting will be ejected.

In Figs. 1, 2, 4, and 7 there are shown setscrews 6*, by means of whichthe relation of the cope and drag may be adjusted and the thickness ofthe casting regulated.

There is illustratedin Fig. 7 amodified form of device in which there isemployed but a single drawback. Such construction is desir-' able inmaking castings of irregular surface, a cam of peculiar shape, or acasting having a hole therein. All the main features of the modifiedform are such as have been before described, the variation being limitedto the Through the screws g and the i A similar pin or screw nprojecting lever member it is pivotally secured to a projection it onthe drag b and has a slotted connection with the drawback- It will beseen that when the head 0*, with its lateral arm it, moves downward uponthe movement of the operating-lever the pin/t, through its engagementwith the cam-slot k will move the lever member if about its pivotalconnection until it assumes the position indicated in dotted lines andthe drawback if will be withdrawn. A plate A, secured to the projectionconstitutes a guide for the outer end of the drawback. When the levermember [2/ has been operated, the lower portion of the camslot b willcoincide with the path of the pin h, thus permitting the lever member toremain stationary after the drawback has been withdrawn, while the head0 and pin it continue their movement.

It is obvious that several drawbacks might be operated by having a setof such mechanism for each, or several drawbacks which were adapted tomove in the same direction might be connected together and operated by asingle lever member.

It will be seen that we thus provide asimple, cheap, and efficientdevice of great utility by which castings may be rapidly and accuratelymade by a person unskilled in the molding art.

Having thus described our invention, we claim 1. In a device asdescribed, a main frame, a two-part mold, one of said parts beingsecured to said frame, a plunger, an eccentric pivoted to said plungerand bearing upon adjacent oppositely-disposed portions of the mainframe, connections between said plunger and the movable part of themold, a second plunger, ejector means carried by said second plunger,means for transmitting movement to said second plunger by the movementof said firstmentioned plunger, substantially as specified.

2. In a device as described, a main frame, a

two-part mold, one part of which is secured to said frame, a plunger, aneccentric pivoted to said plunger and bearing on adjacent portions ofthe main frame, connections from said plunger to the movable part ofsaid mold,

casting-ejector devices, means for giving to.

said casting-ejector devices a limited movement in either direction bythe movement of said plunger, substantially as specified.

3. In a device as described, a main frame and a movable head mountedtherein, a lever to move said head, a mold, the drag of which is securedto said mainframe, the' cope of which 'is secured to and movable withsaid movable head, casting-ejector devices adapted to be contacted andgiven a limited movement by said movable head near the limit of itsstroke, and means to return said casting-ejector devices to normalposition by the movement of said movable head near the limit of itsreturn stroke, substantially as specified.

4. In a device as described, a main frame, a

movable head mounted therein, means for giving to said head areciprocating movement, a mold, the drag ofywhich is securedto. saidmain frame, and the cope of which is secured. to and movable with saidhead, casting-ejector devices, means whereby said head will be given amovement independent of said casting-ejector, means for giving to saidhead an additional movement coincident with the movement of said castingejector devices, means for giving to said head a return movementindependent of said casting-ejector devices, means for giving to saidhead an additional return movement coincident with the return movementof said casting-ejector devices, substantiallyas specified.

5. In a machine as described a main frame, an operating-lever, aseparable mold, a series of movable false cores forming a part of saidmold, casting-ejector means, means connected with said operating-leverfor operating all of said parts, viz. the separable mold, the falsecores and the casting-ejector by a single operation. of the leverandmeans for returning said parts to normal position by the reversemovement of said lever, substantially as specified.

6. In a deviceas described, a main frame, a movable head mountedtherein, means giving to said head a reciprocating movement, a mold, thedrag of which is secured to said main frame, and the cope of whichissecured to said movable head, casting-ejector devices,

' false cores forming a part of said mold, a reciprocating member tooperate the false cores upon the movement of the mold, means for givingto said cope an additional movement independent of said reciprocatingmember whereby the cope will-be opened and the casting ejected,substantially as and for the purpose specified. v

7 In a device as described, a separable mold, one or more drawbacks,protruding ends on said drawbacks, a lever member pivoted to each ofsaid drawbacks, a longitudinallymovable member adapted when moved in onedirection to operate said lever members and withdraw said drawbacks, andwhen moved in the opposite direction to contact the protruding ends ofsaid drawbacks and return said drawbacks to normal position, anoperating-lever, means for opening said mold and withdrawing saiddrawbacks by giving to the cope of said mold an initial movementindependent of the movement of said drawbacks, and means for giving tosaid cope an addi-' tional movement simultaneous with the movement ofsaid drawbacks through the-operation of said operating-lever,substantially as specified. v I 1;,-

8 In a device as described, a main frame, a mold, drawbacks forming.apart of said mold, a longitudinally-movable member adapted uponmovement-to operate said drawbacks, an operating-lever, a link connectedto said movable member, camways in said link, a projection on said. mainframe engaging one of said camways'and a projection on saidoperating-lever engaging the other camway, substantially as and for thepurpose specified.

9. In a device as described, a mold, an operating-lever, drawbacksforming a part of said mold, protruding. ends on said. drawbacks, alever member pivoted to each of said drawbacks, a longitudinally-movablemember adapted when moved in one direction to operate said lever memberand withdraw said drawbacks, and when moved in the opposite direction tocontact the protruding ends of said drawbacks to return said drawbacksto normal position, means for simultaneously moving the cope of saidmold and withdrawing said drawbacks by the operation of said -lever,substantially as specified.

10. In a deviceias described, a separable mold, one or morecasting-ejectors, an operating-lever, means for opening said mold andejecting the casting by giving to the cope of said mold aninitialtmovement independent of said casting-ejector, means forgiving tosaid cope additional movement simultaneous with the movement of saidcasting-ejecto'rs through the operation of said operatinglever,

substantially as specified.

l1. Ina device as described, a separable mold for irregular casting, acasting-ejector, a drawback, an operating-lever, connections betweensaid lever and said separable mold, connection between said leverandsaid casting-ejector, connection between said lever and said drawback,and. means for operating all of said parts by the single operation ofsaid lever, substantially asspecified.

In testimony whereof we have hereunto set our hands this 27th day ofJanuary, A..D.

CHARLES D. GRIMES. BENJAMIN F. EILERMAN. THOMAS A. LEGLER, JR.Witnesses:

ELLENORE OHMER, JOHN RoEHM.

